pepper tree vs genus Schinus

pepper tree and genus Schinus both are nouns.

Word	Noun	Adjective	Verb	Adverb
pepper tree	Yes	No	No	No
genus Schinus	Yes	No	No	No

pepper tree (noun)	genus Schinus (noun)
small African deciduous tree with spreading crown having leaves clustered toward ends of branches and clusters of creamy flowers resembling lilacs	genus of evergreen shrubs and trees of tropical and subtropical regions of South and Central America and Canary Islands and China
small Peruvian evergreen with broad rounded head and slender pendant branches with attractive clusters of greenish flowers followed by clusters of rose-pink fruits